History
John Stone Stone patented the first direction finding system in 1902 (U.S. Patent 716,134). Alternate and improved direction finding systems were invented by Lee de Forest in 1904 (U.S. Patent 771,819), and by Italian engineers Ettore Bellini and Alessandro Tosi in 1909 (U.S. Patent 943,960). In 1919, British Army Officer Frank Adcock proposed an improved direction finding antenna design Adcock antenna (UK Patent 130,490).
The US Army Air Corps in 1931 tested a primitive radio compass that used commercial stations as the beacon.
Read more about this topic: Radio Direction Finder
Famous quotes containing the word history:
“In nature, all is useful, all is beautiful. It is therefore beautiful, because it is alive, moving, reproductive; it is therefore useful, because it is symmetrical and fair. Beauty will not come at the call of a legislature, nor will it repeat in England or America its history in Greece. It will come, as always, unannounced, and spring up between the feet of brave and earnest men.”
—Ralph Waldo Emerson (1803–1882)
“There is no history of how bad became better.”
—Henry David Thoreau (1817–1862)
“While the Republic has already acquired a history world-wide, America is still unsettled and unexplored. Like the English in New Holland, we live only on the shores of a continent even yet, and hardly know where the rivers come from which float our navy.”
—Henry David Thoreau (1817–1862)